WARNING: The following contains spoilers for The Amazing Spider-Man #41 by Nick Spencer, Ryan Ottley, Cliff Rathburn, Nathan Fairbairn and VC's Joe Caramagna, on sale now.
Fred Myers, a.k.a. Boomerang, rides through New York City in a convertible, basking in the glory of his new-found and adoring fans in The Amazing Spider-Man #41. He jumps out of the car, grinning and waving his hands. He says, "Okay, Boomers!" Instantly, this gives the term "boomers" -- and the "OK Boomer" meme -- new meaning within the Marvel Universe.
Boomerang, one time a Kingpin crony and bad guy, has now rebranded himself as a superhero and gained a fan base as a result. Boomerang affectionately refers to his fans as "Boomers."
Boomerang has mostly existed in the Marvel comics universe in obscurity. His origins are brief and comical: Fred Myers was born in Australia but raised in the United States. At a young age, he discovered he could throw things exceptionally hard and with deadly accuracy. Seriously, that's his only power.
Fred Myers used his talent to become a Major League Baseball pitcher. His career was cut short after he was involved in several incidents in which he accepted bribes and lost big games on purpose. His willingness to break the rules for money is his primary motivation when he joins Wilson Fisk as one of his henchmen. Boomerang has spent the majority of his comic career as a B-list supervillain.
It wasn't until 2017's Secret Empire that Boomerang dropped the whole "bad guy" thing. When HYDRA is on the verge of taking over the world, Boomerang stops being loyal to the bad guys because he doesn't want the world destroyed. Because his primary motivator is money, his ideology doesn't dictate his loyalties. Thus, the transition from working for Wilson Fisk to working with Spider-Man was somewhat smooth. In truth, Boomerang isn't a "good guy.” His moral code is loose and in the past he had no problem hurting people for money.
Boomerang has always been a character who doesn't take himself too seriously. In fact, he doesn't take anything seriously -- though he does seem to at least appreciate his new fans. "OK, Boomer" has a somewhat derogatory meaning in its original form, but Boomerang's use spins that on its head. This fits with his character, since he consistently takes what's offered to him and alters it for his own gain.
He doesn't mind shocking or offending and always gets a kick out of going against the grain. Boomerang is a character with lots of room for development who brings something different to the Marvel Universe. For the time being, he's on the road to redemption and his Boomers are supporting him.